Power-transmitting mechanism



March 18, 1924. 1, 87,373

G. DEAKlN POWER TRANSMITTING MECHANISM Filed May 2, 1922 20 /2 25 3 m 2 I M 4 2a F/y Z 25 52 I mm mm J0 x Patented Mar. 18, 1924.

UNITED STATES PATENT OFFICE.

GERALD DEAKIN, OF ANTXVERP, BELGIUM. ASSIGNOR TO WESTERN ELECTRIC COM- PANY, INCORPORATED, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK.

POXVER-TR-ANSMITTING 1V1:EGHANISMT.

Application filed May 2, 1922. Serial No. 557,818.

To all whom it may concern:

Be it known that I, GERALD DEAKIN, a citizen of the United States, residing at Antwerp, in the Kingdom of Belgium, have invented certain new and useful Improvements in Power-Transmitting Mechanisms, of which the following is a full, clear, concise, and exact description.

This invention relates to power transmitting mechanisms and is directed, more particularly, to an intermittent driving device which is especially adapted for use in driv ing rotary switches such as are employed in certain types of automatic telephone exchanges.

One type of rotary switches to which the invention is applicable is generally known in telephone parlance as sequence switcheswhich. derive their name from the factthat their function is to open and close a plurality of circuits sequentially to control in proper order the operations of the several switching devices and adjunct apparatus which are employed in the mechanical establishment of connections between telephone subscribers. In order that the time required for the completion of a telephone connection may be as short as possible, it is necessary that every piece of apparatus involved shall operate as rapidly as possible. The sequence switches are not only required to operate speedily, but in each cycle of operation consisting usually of only one revolution, are required to make many stops, each in a definite angular position and it is therefore evident that some provision must be made to quickly and accurately stop them in each position.

It is an object of this invention to provide braking means for quickly and accurately stopping the movement of a relatively high speed rotating device such as a sequence switch, which will insure against overthrow, without inducing excessive wear.

Another object of the invention is the provision of means whereby wear on the braking means may be compensated for.

In accordance with the above objects the invention consists in the combination of driving and driven members normally held out of engagement by a spring-pressed roller, and electromagnetic means for engaging said members, with a sto against which the driven member is force by the springpressed roller immediately upon the deenergization of the electromagnetic means and the disengagement of the driven member from the driving member. The stop is rendcred adjustable to compensate for wear and the spring-pressed roller is mounted to en able an adjustment of the frictional retarding force to be applied by the stop. The pole pieces of the electromagnetic means are placed in magnetic proximity respectively to the driving and driven members and are adjustable for the purpose of regulating the airgaps in the magnetic circuit.

Still other features will be apparent in the details or construction as set forth in the following description and appended claims.

The accompanying drawing illustrates the preferred form of the invention, wherein ig. 1 is a side elevation partly in cross section of a mechanism in accordance with this invention and includes a fragmentary showing of a sequence switch. Fig. 2 is a view in cross section on the horizontal line CD of Fig. 1 of the mechanism and Fig. 3 is a detail view partly in section taken along the line AB of Fig. 2.

The continuously rotating driving shaft 1 is mounted by means of adjustable ball bearings 2 upon a portion 3 of the framework of the switch, which framework is secured to a supporting member 4:, a portion only of which is shown. The driving disc 5 carries a collar 6 of considerable length, bored to fit around the shaft 1 and secured thereto by means of set screw 7. The edge of the disc 5 is bevelled as shown. The portion 3 of the framework of the switch is shaped as shown in Fig. 2 and is provided with a projecting portion 8. This portion 8 forms a support for a member 9, two arms of which fit around the portion and are socured on either side thereof by set screws 10 in such a manner that the member 9 is pivoted upon the frame 3 and may be rocked upon the said screws 10 as a pivot. The driven disc 11 consists of an outer ring 12 secured to an inner ring 13 located around or otherwise secured to the shaft 14 by means of radially extending arms 15. This construction permits the outer edge of the ring 12 to be pulled down slightly, the edge of ring 12 being normally positioned as shown in Fig. 1 in close proximity to the outer edge of the disc 5 so that only a slight air gap exists therebetween. The outer shown USU U. QiliTQP may he inoreu u to the center portu th driving disc 1 formed intec'rnh f t1 disc nieinher S) 1 litenuingl i with zinc 1 titLc-lft, ot the nertion I The end iii suic ii depression or 11)1G 1. e i d hy the upper riundeu en a, the inner end ut upted to screw into the tri. 11Q\' 1' i; lhe screw 1- has it hnuried e nortion 19. The lower fiiOli of the nher ins secured thereto nevus oi 1 1 P 21 into ent W1 of t essinsl' through a portion of the future ing shove the driven disc 11 is it screw t 1e ioiver end oi u'hicn curries u hruhe hioch or step the 1oner surtuce oi which engages the upper surface 01" tne driven disc 11 The screvv 2-1: carries :1 1oching nut Secured to 21 portion 2'? oi the irzuneuerh hv means of scr ws are the spoo of an eicctroiniignet. the cores of -which extend pm 'uiiei to and hehnv the driving ind driven discs. The ends o are surrounded h members )1]. Screwed into the upne side of the me:

1' 1*.i 1 a r i 1 c J 2 111115121 o1e P010 PiQtf-"S the 1c is or v. inch are provided ii-i sundi hoies around the circuin for the reception of spanner Wrench in o der to pe nit the pol pieces t oi ir nhers 110 are L 11 he screwed into the 111(I11iJQ1S "'1. The pole pieces :ire inched in position h means of screws sur'tncis (y: tne peie pieces qu 'ed pziruiiei Witt the under sin-races ot' the discs ind their positions ure such thi'it one po1epiece is under :1 portion of the d i disc 5, While the other under :i portion oi" the driven The terininuis (rt 1' 1e Windiue' Disc 3t and roiier 37 we proire that the switch W11 stop in switches i, u descrip- 1 ins 1e hm. to the :i'toreineir vice is 15 'iOiiUYVS.

1 to drive the shutt is; energri' d and the disc 1 nt with the drivsion o the spring 11 therece 0t 1g) 2 i hiie the under us pressed into The driven tog 'ether A hf. power end rotates iii? 21 roiuu ne 'ucted into em .singr tilt. roiier 23 to is desired to stop the movement lie-h u'net is deeuer- .ce oi" the driven of the spring 21 1e under surtiu-e c fr ction hetn'een the t upper suri uce of the causes the hr to he ininiediuteiv it has heen found that this rsceedineiv eiiicient in pruci in moving); even at 11 1 speed. heie' hroirght to rest :ic-

'u.:ite1 in the desired pos The tension (-11 rted h i' the spring 721, to torce the roiier 2i, zmjiiiuet the d sc 11 eusiiv udjusted h c iuingr the sci-er 18 which causes the ineinher 9 to roc t 811;11111' shout the pivot surews 10 so :i end. to mov the ioiier tou'zirds or u from the inner s1 :"i'uce or the driven dis 11. The position iiiso he adjusted "QJI surface of the (u A 1 c 11 h v turning the screw 21: which ine he ioched in the position to \vhieh it is ,et menus ot the inching nut By this rrzi n ecuieut he coinpe wai ed tor and the uir gap hetneen the d iving: end dr ven disc adjusted.

The ii 1521p hetv e m the edgeso't the drivi'i riven (ii 2150 he readily nth 1 t, A iinension hr moving hr (3 rehitivei to the shaft 7. Fur

the the position (it the poie pieces 31 with respect to the discs may he varied by screw- 11 these pieces into or out of the cores 30.

the pole pieces being locked in any desired ,7 position by means of the said screws 32.

While one specific embodiment of the invention has been described, this has been given by way of example, and it will be fully understood that the particular manner of carrying out the invention may be modified in many ways without departing from the spirit thereof which consists essentially of a mechanical brake associated with the driven member adapted when operated to arrest this member and to hold it against movement when at rest.

What is claimed is:

1.. In a driving mechanism, a rotatable driving member, a rotatable driven member normally disengaged from said driving member, means for intermittently flexing one of said members into driving engagement with the other, and means for frictionally engaging said driven member upon its release from said driving member operable to stop the rotation of said driven member.

2. In a driving mechanism, a rotatable driving member, a rotatable driven member normally disengaged from said driving member, means for intermittently flexing one of said members into driving engagement with the other, and an adjustable stop for frictionally engaging said driven member upon its release from said driving member to stop the rotation of said driven member.

3. In a driving mechanism, a rotatable driving member, a rotatable driven member normally disengaged from said driving member, means for flexing said driven member into driving engagement with said driving member, a stop for frictionally engaging said driven member upon the release of the latter from said driving member, and spring means for forcing said driven member against said stop.

4. In a driving mechanism, a rotatable driving member, a rotatable driven member normally disengaged from said driving member, means for flexing said driven member into driving engagement with said driving member, a stop for frictionally engaging said driven member upon the release of the latter from said driving member, and means opposed to said stop for forcing said driven member into engagement with said stop.

5. In a driving mechanism, a rotatable driving member, a rotatable driven member normally disengaged from said driving member, means for flexing said driven member into driving engagement with said driving member, a stop for frictionally engaging said driven member upon the release of the latter from said driving member and adjustable spring-pressed means for forcing said driven member into engagement with said stop.

6. In a driving mechanism, a rotatable driving member, a rotatable driven member normally disengaged from said driving member, means for moving said driven member into driving engagement with said driving member, an adjustable stop for frictionally engaging said driven member upon the release of the latter from said driving member, spring-pressed means for forcing said driven member into engagement with said stop, and means for adjusting the tension of said spring-pressed means.

7. In a driving mechanism, a rotatable driving member, a rotatable driven shaft, a driven disc resiliently mounted on said shaft so that its peripheral portion is yieldable in a plane at right angles to the plane of rotation of said shaft, a stop against which said driven disc normally rests, said stop being adapted to function as a brake for said driven disc, electromagnetic means for forcing said driven disc into driving engagement with said driving member and out of engagement with said stop, and a springpressed roller bearing on said driven disc operable to force said disc into engagement with said stop upon deenergization of said electromagnetic means.

8. In a driving mechanism, a driving member and a driven member normally disengaged, an electromagnet for actuating one of said members into driving engagement with the other of said members, said electromagnet having a magnetic circuit including both of said members, and an adjustable pole piece on said electromagnet whereby the magnetic gap between one of said members and said pole piece may be varied.

9. In a driving mechanism, a driving member and a driven member normally disengaged, and an electromagnet for actuating one of said members into driving engagement with the other of said members, said electromagnet having its pole pieces in magnetic proximity respectively to said driving and driven members.

10. In a driving mechanism, a driving member and a driven member normally disengaged, an electromagnet for actuating one of said members into driving engagement with the other of said members, said electromagnet having a magnetic circuit including both of said members, and adjustable pole pieces on said electromagnet whereby the magnetic gaps between said members and said pole pieces may be varied.

11. In a driving mechanism, a driving member and a driven member normally disengaged, an electromagnet for actuating one of said members into driving engagement with the other of said members, said electromagnet having a magnetic circuit including its core and both of said members, and adjustable pole pieces for said electromagnet comprising members threaded into the ends of the core or saie eleetromagnet whereby the n'iagnerie gaps between said members and said pole pieces may be varied.

12. In a driving mechanism, a driving member a d a driven member normali; disengaged, a stop against which said driven member normally resrs said stop being adjustable toward and away from said driven member and adapted in fnnerion as a brake for said driven member, means for forcing said driven member into driving engagement with said driving member, a pivotaliy mounted spring arm, a roller pivoted on said spring arm and bearing against said driven member under the tension of said spring arm and tending to force said driven member against said stop, and a micrometrie adjustment device for varying the pressure of said roller against said driven member.

In Witness whereof I hereunto subscribe, my name this 13th day of April A. D, 1922.

GERALD DEA KIN. 

